K-6GUBB Series:Class I, Div. 1 and 2,Groups ifp»DClass II, Div. 1 and 2,Groups E,F,GClass III

GUBB Cast Junction Boxes for Drillingand Tapping. Explosion-Proof,Dust-Ignition-Proof.Drilled and tapped openings from 1/2" thru 4" as specified.

Cover Catalog NumberSize (Inches) Opening MalleableLxWxD (Inches) Form No. Iront Aluminum'

7 x 6-1/2 x 6-3/8 5.38 1 GUBB-11 GUBB-11 A

0x8x6-9 /16 7.19 2 GUBB-22 GUBB-22A

12 x 12 x 7-7/8 9.81 3 GUBB-33 GUBB-33A

$ Malleable iron and aluminum boxes furnished with aluminum cover. * Shaded area indicates items also suitable for Groups B and C.

GROUP BANDCSEALING REQUIREMENTS

SealsBox Group Required*

GUBB B,C Yes

GUBB No

GUBB-11,11A (2 Lugs)

GUBB-22,22A (2 Lugs)

GUBB-33,33A (4 Lugs)

'Sealing fitting must be installedwithin 2" of each conduit en-trance (max. conduit for Group Band C is 2").

HDimensions In Inches tlnside dimensions.

Cat. No. AGUBB-11GUBB-11 A 6'50

GUBB-22GUBB-22A 80°

GUBB-33GUBB-33A 120°

B

7.00

10.00

12.00

Ct Dt

5.50 5.94

7.13 9.00

10.75 10.75

E

5.38

7.19

9.88

F

6.00

9.00

10.00

G

7.75

9.25

13.13

H

.50

.50

.63

J

6.38

6.56

7.88

K

3.69

3.50

3.94

L

4.88

4.63

5.25

M

4.63

4.63

5.38

N U

6.25 8.75

8.00 10.25

11.00 14.38

Dimensions in Centimeters flnside dimensions.

GUBB-11GUBB-11 A 16.5 17.8 14.0 15.1 13.7 15.2 19.7 1.3 16.2 9.4 11.8 11.8 15.9 22.2

GUBB-22GUBB-22A 20.3 25.4 18.1 22.9 18.3 22.9 23.5 1.3 16.7 8.9 11.4 11.8 15.9 26.0

GUBB-33GUBB-33A 30.5 30.5 27.3 27.3 25.1 25.4 33.3 1.6 20.0 10.0 11.1 13.7 27.9 36.5

Effective October, 1993Copyright 1993 Printed in U.S.A.

PAGE 6

1701 West Wellington AvenueChicago, Illinois 60657

K-2Cast Junction Boxes:Explosion-Proof, Dust-Ignition-Proof.UNILETS® for Use with Threaded Metal Conduit.

B

Applications• Explosion-Proof and Dust-Ignition-Proof, for use in classified locations con-taining such gases as butane, gasoline,hexane, naphtha, benzene, lacquer sol-vent vapors and alcohol.• Corrosion-resistant— ideal indoors oroutdoors.• Junction or pull box for pulling andsplicing of wires and as an enclosure forelectrical devices.• Ideal where number and size of con-ductors require a junction box with ad-ditional space.• Excellent for use in classified-areawiring of motors, circuit breakers, panel-boards, entrances to buildings, etc.

Features: All Boxes• Provided with mounting lugs (exceptDER).• Furnished with covers.• All conduit hubs and openings providea minimum of five full threads to meetUL requirements.• Accurately tapped, tapered conduitthreads provide tight, rigid joints andground continuity.

Features: GUB/GUBB SeriesQWide selection of sizes and locationsfor brazed threaded hubs or drilled andtapped conduit openings.• Suitable for use as an enclosure forrelays, instrument and other control ap-paratus in classified locations.• Available in high tensile strengthmalleable iron or copper-free aluminumbodies.• Smooth, rounded integral bushing inevery brazed hub protects conductor in-sulation.• Provided with mounting lugs.• O-Rings available for forms 1, 2 and3 to provide raintight fit.Features: GUBD Series (Domeand Plate)0 GUB junction boxes with domecover and mounting plate provide flex-ibility for a wide variety of applications.• Ideal for housing relays, contactors,terminal blocks and other classified-area applications.• Mounting plate can be drilled to ac-commodate a variety of devices.

Effective October, 1993Copyright 1993 Printed in U.S.A.

PAGE 2

1701 West Wellington AvenueChicago, Illinois 60657

K-3Cast Junction Boxes:Explosion-Proof, Dust-Ignition-ProofUNILETS® for Use with Threaded Metal Conduit.

• Dome cover has nominal depth of 6"to 17", depending upon box selected.Provides significant increase in cu. in.capacity.• Smooth, rounded integral bushing inevery brazed hub protects conductorinsulation.• O-Rings available to provide rain-tight fit.• Provided with mounting lugs.Features: GUBM Series(Instrument)© GUBM junction boxes serve as anenclosure for meters, gauges and sim-ilar devices.• Complete with round, explosion-proofglass window cover. Permits directreading of enclosed instrument.• Furnished with one 3/4" hub.• Mounting bosses provided in back ofGUBM can be drilled and tapped forfastening of instrument mountingbracket.• Smooth, rounded integral bushing inevery brazed hub protects conductorinsulation.• O-Rings available to provide rain-tight fit.• Provided with mounting lugs.Features: DER SeriesO Available with brazed hubs.• Malleable iron bodies for high tensilestrength and ductility. Provides greaterresistance to impact, shock and cor-rosion.• Smooth, rounded integral bushing inevery brazed hub protects conductorinsulation.• O-Rings available to provide rain-tight fit.• Function as sealing fittings whenused with sealing cover (see NEC forrestrictions).Features: EJB Series(Aluminum)0 Furnished with O-rings in mostsizes—provides watertight fit.• Cast copper-free aluminum box andcover. Provides greater resistance tocertain types of corrosive atmos-pheres.• Outboard ground joint cover openingprovides maximum usable space for

pulling wires and installing devices.• Extra wide, accurately ground mat-ing surfaces with closely spaced steelhex-head cap screws with dichromatefinish assure a flame-tight joint.• Provided with mounting lugs.• Bosses are blind tapped as a pro-vision for securing MP Mounting Plates.• Two stud bolts with nuts furnishedon 12x12 and larger boxes. For use indiagonally opposite corners of body toaid in aligning cover (not furnished withhinge cover).• Hinge holes provided as standard on12x12 and larger boxes.Features: EXB Series (CastIron)O Wide selection of sizes and loca-tions for drilled and tapped openings.• Cast iron box and cover with alu-minized finish.• Extra wide, accurately ground mat-ing surfaces with closely spaced stain-less steel hex-head cap screws as-sure a flame-tight joint.• Provided with mounting lugs.Standard Materials• DER, GUB, GUBB, GUBD: mallea-ble iron bodies and copper-free alu-minum covers.• GUBM: malleable iron bodies withcopper-free aluminum and glass cover.• EJB: copper-free aluminum bodiesand covers.• EXB: cast iron bodies and covers forsizes up to 30x12; 30x12 and largersizes in aluminum.• Separate Covers:DER Sealing Cover—malleable iron.DER, GUB and GUBB Surface Coversand GUB and GUBB Dome Covers—aluminum.Standard Finishes• DER, GUB and GUBB malleable ironbodies: triple-coat—(1) zinc electro-plate, (2) dichromate, and (3) alumi-num polymer enamel.• DER, GUB and GUBB aluminumcovers and GUBB aluminum bodies:aluminum polymer enamel.• DER malleable iron sealing covers:triple-coat—(1) zinc electroplate, (2)dichromate, and (3) aluminum polymerenamel.

• EXB cast iron bodies and covers: hot-dip galvanized.• EJB aluminum bodies and covers:natural finish.Options: DER, GUB and GUBB• O-Rings. Suffix—OR.• Less Cover. Suffix —LC.• Terminal Blocks. Information pro-vided upon request (except DER-1).• Instrument Mounting Plate andBracket for GUBM. Information pro-vided upon request (submit completedimensions of instrument to be used).Options: EXB and EJB• Hinged Covers. Hinges on 12x12x8and larger EJB boxes: Suffix —H.EXB hinges: Information provided onrequest.• Mounting Plates. Mounting plates onall EJB boxes: Suffix —MP.EXB mounting plates: Information pro-vided on request.• Terminal Blocks. Information pro-vided upon request.Compliances• UL Standard 886.• Appleton malleable iron productsconform to ASTM A47-77, Grade32510, which has the following prop-erties: tensile strength, 50,000 psi;yield, 32,000 psi; and elongation, 10%.• Appleton aluminum products areproduced from a high strength copper-free (4/10 of 1% max.) alloy.• Suitable for Class I, Div. 1 & 2, if in-stalled in compliance with NEC 501-4(a)(b) and for Class II, Div. 1 & 2, ifin compliance with NEC 502-4(a)(b).

a

Effective October, 1993Copyright 1993 Printed in U.S.A. Appleton

• • ELECTRIC COMPANY

1701 West Wellington AvenueChicago, Illinois 60657

PAGE 3

K-7Ordering Information: GUBB Boxes;Blank Bodies for Drilling and Tapping.

Determine catalog number as follows:(1) select GUBB junction box catalognumber; (2) select "Conduit OpeningArrangement Diagram" number; and(3) select symbols that represent con-duit opening sizes from "Symbol Table."Where no opening is required, the sym-bol 0 must be inserted. Add suffix forother Optional Features. The variousdivisions of the complete catalog num-ber should be separated by dashes.ExampleThe junction box selected is GUBB-33and the "Conduit Opening Arrange-ment" is diagram #1. Opening "a" isto be 3/4"; "b", no opening required;"c", 2"; and "d", 1-1/4.In this example, the complete catalognumber is:GUBB-33—1—BOFD

Standard Conduit OpeningArrangement DiagramsOpening "a" is always TOP of box

Side

m I k j

Symbol Table

Drilling and Tapping (Five Threads Win.)

Size (In.)

Blank1/23/411-1/41-1/2

Symbol

0ABCDE

Size (In.)

22-1/233-1/24

Symbol

FGHJK

Minimum Recommended Spacing Between Conduit OpeningsAllowance made for clearance over bushings. When unions or seals are used, additional spacemust be allowed.Table shows minimum distances between conduit-opening centerlines in various size com-binations. For example, if 1-1/2" and 3/4" openings are to be drilled and tapped into one sideof box, the minimum spacing between centerlines would be 2.13".

ConduitSize (Inches)

1/2

3/4

1

1-1/4

1-1/2

2

2-1/2

3

3-1/2

4

Minimum space between conduit opening

1/2 3/4 1 1-1/4 1-1/2 2 2-1/2

centerlines, inches3 3-1/2 4

1.25

1.38

1.56

1.88

2.00

2.38

2.50

2.88

3.13

3.44

1.50

1.69

2.00

2.13

2.50

2.63

3.00

3.25

3.56

1.88

2.19

2.31

2.69

2.81

3.19

3.44

3.75

2.44

2.63

2.94

3.13

3.44

3.75

4.06

2.75

3.13

3.25

3.63

3.88

4.19

3.44

3.63

3.94

4.25

4.56

3.75

4.13

4.38

4.69

4.44

4.75

5.06

5.00

5.31 5.63

Diameters of Bushings, Unions, Conduit and Seals, InchesDiameters of fittings for 1/2 thru 4'

Conduit Size (Inches)

BBU Bushing

BU Bushing

UNY-UNF (R) Union

Conduit

EYM-EYF Seals T.R.t

1/2

1.06

1.13

1.50

.88

1.06

3/4

1.31

1.25

1.75

1.06

1.19

1

1

1

.56

.63

2.00

1

1

.38

.38

1-1/4

1.94

2.06

2.81

1.69

1.75

1-1/2

2.19

2.31

3.06

1.94

2.06

conduit2

2.69

2.94

3.75

2.38

2.31

2-1/2

3.19

3.25

4.94

2.88

2.69

3

3.88

3.88

5.44

3.50

3.13

3-1/2

4.38

4.56

5.94

4.00

3.44

4

4.88

5.06

6.50

4.50

3.69

tTR. is turning radius.

Wall Thickness and Maximum Conduit Size, Inches

BoxType

GUBB-11, GUBB-11AGUBB-22, GUBB-22AGUBB-33, GUBB-33A

Top, Bottom and SidesWall MaximumThickness Conduit Size

.44 2

.44 2

.56 2

BackWall MaximumThickness Conduit Size

.44 2

.63 4

.81 4

All conduit openings will be located in centerline of walls and evenly spacedunless otherwise specified.

TopBack Top

If a "Standard Conduit Opening Ar-rangement" is not suitable for the ap- Frontplication, or when openings are to bemore accurately spaced, submit sketch,locating openings (1) from centerlinesof box and (2) from outside back of box(or from mounting lug surface if lugs aresupplied).

Side

GUBB-11,22 GUBB-33(also GUBB-11 A, 22A) (Also GUBB-33A)

Refer to Pricing Index for price,weight, and standard packageCopyright 1984 Printed in U.S.A.Effective Jan. 1984

1701 W. Wellington Ave.Chicago, Illinois 60657

PAGE 7